add basic camera controls

include/td/Maths.h

@@ -183,6 +183,51 @@ T Lerp(T v0, T v1, T t) {
 
 }  // namespace maths
 
+template<typename T>
+Vec2<T> operator+(const Vec2<T>& vect, const Vec2<T>& other) {
+	return {vect.x + other.x, vect.y + other.y};
+}
+
+template<typename T>
+Vec2<T> operator- (const Vec2<T>& vect) {
+	return { -vect.x, -vect.y };
+}
+
+template<typename T>
+Vec2<T> operator- (const Vec2<T>& vect, const Vec2<T>& other) {
+	return vect + (-other);
+}
+
+template<typename T>
+Vec3<T> operator- (const Vec3<T>& vect) {
+	return { -vect.x, -vect.y, -vect.z };
+}
+
+template<typename T>
+Vec3<T> operator+ (const Vec3<T>& vect, const Vec3<T>& other) {
+	return { vect.x + other.x, vect.y + other.y, vect.z + other.z };
+}
+
+template<typename T>
+Vec3<T> operator- (const Vec3<T>& vect, const Vec3<T>& other) {
+	return vect + (-other);
+}
+
+template<typename T>
+Vec4<T> operator- (const Vec4<T>& vect) {
+	return { -vect.x, -vect.y, -vect.z, -vect.w };
+}
+
+template<typename T>
+Vec4<T> operator+ (const Vec4<T>& vect, const Vec4<T>& other) {
+	return { vect.x + other.x, vect.y + other.y, vect.z + other.z, vect.w + other.w };
+}
+
+template<typename T>
+Vec4<T> operator- (const Vec4<T>& vect, const Vec4<T>& other) {
+	return vect + (-other);
+}
+
 template <typename T>
 sp::DataBuffer& operator<<(sp::DataBuffer& a_Buffer, const Vec2<T>& a_Vec) {
 	return a_Buffer << a_Vec.x << a_Vec.y;

include/td/render/Camera.h

@@ -35,6 +35,7 @@ class Camera {
 	void UpdatePerspective(float a_AspectRatio);
 
 	void SetCamPos(const Vec3f& a_NewPos);
+	const Vec3f& GetCamPos() const;
 };
 
 }  // namespace render

include/td/render/renderer/WorldRenderer.h

@@ -17,6 +17,9 @@ class WorldRenderer : public Renderer<shader::WorldShader> {
 	virtual ~WorldRenderer();
 
 	virtual void Render(float a_Lerp) override;
+
+  private:
+	void UpdateControls();
 };
 
 }  // namespace render

src/main.cpp

@@ -1,68 +1,18 @@
-// #include <chrono>
-// #include <td/display/state/MainMenuState.h>
-// #include <td/misc/Time.h>
-
-#define SOL_ALL_SAFETIES_ON 1
-#include <sol/sol.hpp>
-
-void some_function() {
-	std::cout << "some function!" << std::endl;
-}
-
-void some_other_function() {
-	std::cout << "some other function!" << std::endl;
-}
-
-struct some_class {
-	int variable = 30;
-
-	double member_function() {
-		return 24.5;
-	}
-};
+#include <chrono>
+#include <td/display/state/MainMenuState.h>
+#include <td/misc/Time.h>
 
 int main(int argc, char** argv) {
 	// init GL context
-	// td::Display display(1920, 1080, "Tower-Defense 2");
+	td::Display display(1920, 1080, "Tower-Defense 2");
 
-	// display.ChangeState<td::MainMenuState>();
+	display.ChangeState<td::MainMenuState>();
 
-	// td::Timer timer;
-	// while (!display.IsCloseRequested()) {
-	// 	display.PollEvents();
-	// 	display.Update(timer.GetDelta());
-	// }
-
-	std::cout << "=== functions (all) ===" << std::endl;
-	
-	sol::state lua;
-	lua.open_libraries(sol::lib::base);
-
-	// put an instance of "some_class" into lua
-	// (we'll go into more detail about this later
-	// just know here that it works and is
-	// put into lua as a userdata
-	lua.set("sc", some_class());
-
-	// binds a plain function
-	lua["f1"] = some_function;
-	lua.set_function("f2", &some_other_function);
-
-	// binds just the member function
-	lua["m1"] = &some_class::member_function;
-
-	// binds the class to the type
-	lua.set_function("m2", &some_class::member_function, some_class{});
-
-	// binds just the member variable as a function
-	lua["v1"] = &some_class::variable;
-
-	// binds class with member variable as function
-	lua.set_function("v2", &some_class::variable, some_class{});
-
-	lua.script_file("test/main.lua");
-
-	std::cout << std::endl;
+	td::Timer timer;
+	while (!display.IsCloseRequested()) {
+		display.PollEvents();
+		display.Update(timer.GetDelta());
+	}
 
 	return 0;
 }

src/td/render/Camera.cpp

@@ -1,3 +1,4 @@
+#include "td/Maths.h"
 #include <td/render/Camera.h>
 
 #include <cmath>
@@ -24,5 +25,9 @@ void Camera::SetCamPos(const Vec3f& a_NewPos) {
 	OnViewChange();
 }
 
+const Vec3f& Camera::GetCamPos() const {
+	return m_CamPos;
+}
+
 }  // namespace render
 }  // namespace td

src/td/render/renderer/WorldRenderer.cpp

@@ -1,3 +1,4 @@
+#include <td/Maths.h>
 #include <td/render/renderer/WorldRenderer.h>
 
 #include <td/render/loader/WorldLoader.h>
@@ -13,7 +14,17 @@ WorldRenderer::WorldRenderer(Camera& a_Camera, const game::WorldPtr& a_World) :
 
 WorldRenderer::~WorldRenderer() {}
 
+void WorldRenderer::UpdateControls() {
+	if (ImGui::IsMouseDown(ImGuiMouseButton_Left)) {
+		constexpr float sensitivity = 1.0f;
+		float delta = ImGui::GetIO().DeltaTime;
+		auto mouseDelta = ImGui::GetIO().MouseDelta;
+		m_Camera.SetCamPos(m_Camera.GetCamPos() + Vec3f{-mouseDelta.x * delta * sensitivity, 0, -mouseDelta.y * delta * sensitivity});
+	}
+}
+
 void WorldRenderer::Render(float a_Lerp) {
+	UpdateControls();
 	m_Shader->Start();
 	Renderer::Render(*m_WorldVao);
 }

test/main.lua

@@ -1,24 +0,0 @@
-f1() -- some function!
-f2() -- some other function!
-
--- need class instance if you don't bind it with the function
-print(m1(sc)) -- 24.5
--- does not need class instance: was bound to lua with one 
-print(m2()) -- 24.5
-
--- need class instance if you 
--- don't bind it with the function
-print(v1(sc)) -- 30
--- does not need class instance: 
--- it was bound with one 
-print(v2()) -- 30
-
--- can set, still 
--- requires instance
-v1(sc, 212)
--- can set, does not need 
--- class instance: was bound with one 
-v2(254)
-
-print(v1(sc)) -- 212
-print(v2()) -- 254

xmake.lua

@@ -3,7 +3,7 @@ add_rules("mode.debug", "mode.release")
 add_repositories("persson-repo https://git.ale-pri.com/Persson-dev/xmake-repo.git")
 
 add_requires("imgui 1.92.0", {configs = {sdl3 = true, opengl3 = true}})
-add_requires("libsdl3 3.2.16", "splib 2.3.2", "zlib", "glew", "fpm", "enet6", "sol2")
+add_requires("libsdl3 3.2.16", "splib 2.3.2", "zlib", "glew", "fpm", "enet6")
 
 set_languages("c++20")
 
@@ -21,7 +21,7 @@ target("Tower-Defense2")
     add_includedirs("include", {public = true})
     set_kind("binary")
     add_files("src/**.cpp")
-    add_packages("libsdl3", "imgui", "glew", "splib", "zlib", "fpm", "enet6", "sol2", {public = true})
+    add_packages("libsdl3", "imgui", "glew", "splib", "zlib", "fpm", "enet6", {public = true})
     set_rundir(".")
     add_defines("TD_GL_LOADER_GLEW")